Rivet holder



July 3, 1928. 1,675,773

J. TISSLER RIVET HOLDER Filed Nov. 29, 1926 2 Sheets-Sheet 1 I l i g lInventor July 3, 1928.

J. TISSLER RIVET HOLDER 2 Sheets-Sheet 2 Filed Nov. 29, 1926 wwaaaqq wjkrnq Patented July 3, 1928.

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The present invention relates to a rivet hold r, and aims to provide animproved structure for holding a rivet in ariveting machine in suchjamanner that the holding means is released when thewrivet spreading meanscomes into operation.

Another very important object of the 'vention lies in the provision of amovable rivet holder which will release the :rivet when pushed by thespreading device a prede mi amo nt. a

Anothervery important ob'eotof invention lies in the provision oflarivetholder of this character which is simple in its con struction strong anddurable, inexpensive to manufacture, not likely to easily become out oforder, reliable and efficient, and otherwise well adapted for thepurpose for which it is designed.

With the above and numerous other objects in view as will appear as thedescription proceeds, the invention resides in certain novel features ofconstruction, and in the combination and arrangement of parts as will behereinafter more fully described and claimed.

In the drawings Figure 1 is a side elevation of the device embodying thefeatures of my invention.

' Figure 2 is a front sectional elevation thereof, and

Figure 3 is a top plan view of the rivet holder per se.

Referring to the drawing in detail it will be seen that the numeral 5denotes a supporting structure of any suitable formation. A plunger 6 ismounted in the supporting structure 5 for vertical rectilinear movement,being operated in any suitable manner. The lower end of this plunger 6is reduced as is shown in Figure 3 and this reduced end 7 has its lowerend tapered as at 8, and the extremity is concaved as at 9. A skirt 10is slidable over the reduced end 7 and has longitudinal slots 11 throughwhich cross member 22 to with "the recess 17 having in the bottomthereof a down a dly xte diw Po k 18 formed with an intermediateydisposed shoulder 19. A head 20 is formed with 1:1 depending shank 21verti ally movable in the .PQ Cket 1 8. A cross member '22is threadedly.engagedpn the threaded portion 23 of the [intermed ate ortion of theshank 21 adjathe hea -20. A spring 24 impinges against the shoulder 19and :againstthe cross m mb 2 n rmally holdi g thhead 20 in a -raisedosition. A cross bar 25,is pro 'ylded at t e base of the head 20 and hasupstanding projections 26 with slots 27 therein. L Q ar pi ote on hextremities of the cross member 22 and are pivoted to intermediateportions of fingers 29 which project through the slots 27 and thenextend upwardly and then inwardly over the top of the head 20. The otherends of these fingers are directed downwardly and have pins 30projecting into arcuate slots 31 provided in the side walls of therecess 17. The lower edges of these arcuate slots 31 function as cams.Suitable bufling material 33 is disposed in the bottom of the pocket 18.

When the parts are disposed as in Figure 1, it will be seen that a rivetmay be rested on the head 20 andheld in place by the fingers 29. a Whenthe plunger 6 1s forced downwardly, the lower edge of the skirt 10 willfirst engage with the material and be disposed about the upwardprojecting end of the rivet, thus guiding the reduced end 7 intoengagement with the rivet in proper relation for spreading the extremityof the rivet. As the plunger proceeds downwardly and engages the rivetthe head 20 will be forced downwardly, thus contracting the spring 24and at the same time causing the ull downwardly on the links 28 therebpul ing downwardly on the fingers 27 an the downwardly and outwardlycurved cam slots 31, therefore, will cause the pins 30 to move to thelower ends thereof, thus causing the releasing positions of the fingers29 to occur, at which time the shank 21 will have engaged the propermaterial 33 and stopped so that the end of the rivet is flattened orspread as desirable.

It is thought that the construction, opera-' tion and advantages of thisinvention will 'now be apparent to those skilled in this art without amore detailed description thereof. The present embodiment of theinvention has been disclosed in detail merely by way of 'ficing any ofits advantages.

Having thus described the invention, what a I claim as new and desire tosecure by Letters Patent is I 1. A device of the class described,including a supporting structure having a recess and a pocket in therecess, a shank movable in the pocket, a head on the shank in therecess, a cross member adjustable on the shank, links pivoted to thecross member, fingers pivoted intermediate their ends to the links; theside walls of the recess being provided with slot-s, said fingers havingpins extending into the slots, a spring means normally urging the shankupwardly and the top of the head, said to direct the fingers awayfroxn-the head the fingers in a position to engage the rivet on the topof the head, said slots being curved to direct the fingers away from thehead when the head is moved downwardly.

2. A device of the class described, in-

cluding a supporting structure having a rep cess and a pocket in therecess, a shank movable in the pocket, a head on the shank in therecess, a cross member adjustable on the shank, links pivoted to the'cross member, lingers pivoted intermediate their ends to the links, theside walls of the recess being provided with slots, said fingers havingpins extending into the slots, a spring means normally urging the shankupwardly and the fingers in a position to en ge the rivet on fits beingcurved when the head is moved downwardly, and rivet spreading means forpushing said head downwardly. I

In testimonywhereofI afiix mysignature.

J OSEF TISSLER.

